We use the Mask-RCNN[1]} model of [2]} with a ResNet-50 backbone[3]}; no additional changes to their model are made. Instead of a softmax activation, the model uses a Gumbel activation, given by the formula \(\eta (q) = \exp (-\exp (-q))\) , to transform logits into probabilities. More details about the model and activation can be found in [2]}.
